20-08-2025 19:04
Ethan CrensonHello, This asco was found on the same wood as my
21-08-2025 02:18
Stefan JakobssonOn a necrotic section of a living Tilia cordata I
19-08-2025 20:58
Ethan CrensonHi all, Here is what I believe to be a Hymenoscyp
12-08-2025 19:44
Enrique Rubio
Could someone send me a pdf copy of this article?S
18-08-2025 15:17
Lothar Krieglsteiner
... on 6.7.25 in a subarctic mire near a small lak
18-08-2025 15:07
Lothar Krieglsteiner
.. 20.7.25, in subarctic habital. The liverwort i
19-08-2025 16:27
Paul CannonHello all I have spent some time trying to work o
18-08-2025 22:59
Yanick BOULANGERBonsoirVoici un asco récolté le 08/08/2025Comme
Unfortunately, but my knowledge is too scanty about them to name this collection (
1) I don't see any gelatinous cover on the spores.
2) I also didn't notice germ slit.
3) KOH negative.
4) Substrate unknown (not excluded Populus sp.)?
I measured only mature spores (brown)
(8.9) 9.1 - 10.2 (10.4) × (3.9) 4.1 - 4.6 (4.7) µm
Q = (1.9) 2.1 - 2.3 (2.4); N = 11
Me = 9.6 × 4.4 µm; Qe = 2.2
10.23 4.44
9.93 4.44
9.11 4.07
9.25 4.74
9.78 4.61
9.34 3.94
9.28 4.46
9.67 4.37
10.38 4.45
9.52 4.16
8.90 4.34
Thank you in advance for your help.
Mirek
Dejo un abrazo del género:
http://pyrenomycetes.free.fr/nemania/keydir/dichotomickey.htm
Saludos cordiales.
Thanks to you, I narrowed down the circle of suspects. At first I hesitated between Nemania and Hypoxylon.
Nemania serpens was initially rejected from the circle of suspects, although the macro was very similar. The dimensions of the apical apparatus in this genre are too large.
In my:
Me = 2.7 × 1.8 µm; Qe = 1.5
2.60 1.92
2.67 1.78
2.68 1.99
2.59 1.65
2.85 1.78
I considered Nemania atropurpurea. However, I have comments on the color of the spores. I would rather consider them light brown, whereas N. atropurpurea should be dark brown ??
I looked at all the possibilities and came to the conclusion that N. serpens is probably the most suitable for my collection.
However, taking into account the fact that the dimensions of my collection, despite being within the limits of this species, are however close to their limit values, therefore I should consider mine as:
Nemenia serpens sensu lato !?
I also measured the spores in KOH and they come out a bit bigger ??
I also measured the thickness of the spore wall. It turns out that they have> 0.5um which according to Czech Mykol can be a decisive feature in distinguishing these species. Nemania atropurpurea should have thinner.
Thank you and best regards
Mirek
Thank you very much for valuable suggestions.
This is my first Nemania collection which I microscoped so please forgive me for not providing all the features needed for identification. Beginnings are difficult and especially in such a difficult kind.
A comparison with N. serpens and N. atropurpurea at present is not possible. I don't have fruiting bodies for these species, but in time I'll try to make up for these shortcomings.
I downloaded the monograph on Granmo et al. (1999). if someone was also interested, it is available at:
https://www.researchgate.net/publication/259034689_The_genus_Nemania_sl_Xylariaceae_in_Norden
Regards
Mirek
I had some time to look more at Nemania.
Unfortunately, but I could not determine the species of this Nemania.
Perithecia too big (see photo). The feature set does not match any of the species described in "The genius Nemania".
I haven't found N. atropurpurea yet, but I've had the opportunity to compare fruiting bodies with N. serpens several times.
Regards
Mirek
